Induction-tube furnace blast blower



July 8 1924.

1,506,534 E. H. SWIFT INDUCTION TUBE FURNACE BLAST BLOWER Filed Feb. 2 1921 2 Sheets-Sheet. 1

E. H. SWIFT INDUCTION TUBE FURNACE BLAST BLOWER Filed Feb- 2. 1921 2 Sheets-Sheet 2 Patented July 8, 1924.

EDWIN H. SWIFT, F BROOKLYN, NEW YORK.

INDUCTION-TUBE FURNACE BLAST BLOWER.

Application fil'ed February 2, 1921. Serial No. 441,798.

ToaZZ whom it may concern Be it known that I, EDWIN H. SWIFT, citizen of the United States, and'resident of the borough of Brooklyn, city of New York, in the county of Kings and State of New York, have invented certain new and use ful Improvements in an Induction-Tube Furnace Blast Blower, of which the following is a specification.

This invention relates to an induction-tube furnace blast blower. Its object is the production of a blower that can easily be attached or detached to various types offurnaces for steam boilers or other apparatus, for the purpose of directing an air blast to the fuel of the furnace. The blower is adapted to be connected to the front wall or to the side walls of ash pits of furnaces of steam boilers or to the walls below the fuel bed of other furnaces, providing an air blast or a plurality of air blasts to enchance the combustion of the fuel of the furnace.

The blower comprises an induction and delivery conduit with a pair of telscopic tubular members which can be detachably locked to plates of various thicknesses. An induction tube is located within the conduit. The tube has connected thereto piping for a propelling fluid for producing a flow of air through the induction conduit and delivering it in a blast into the ash pit of a steam boiler or into the ash pit of any type of furnace.

In the accompanying drawings the blower is exemplified with a marine boiler and Fig. 1 shows a sectional view of such a boiler as on the line 1, 1 of Fig. 2 with an exemplification of the blower and its appurtenances indicated in full lines attached thereto; Fig. 2 shows a front view of the boiler and a plurality of the blowers with their appurtenances; Fig. 3 represents an enlarged sectional view on the line 3, 3 of Fig. 4 of the blower; Fig. 4 is a bottom plan view of Fig. 3 and 5 shows an enlarged front elevation of a detail.

The induction tube furnace blast blower comprises an induction and delivery conduit designated in its entirety by the letter A, and in which is coaxially located an induction tube, designated in its entirety by the letter B. Piping designated in its entirety by letter C is connected to the induction tube B.

The induction and delivery conduit A comprises the tubular members and 21 that telescope with each other. The member 20' has the bell shaped or flared inlet end 22 at one end and at its otherend has formed therein thebayonet opening 23. A'fla'nge 24 extends from the outer cylindrical surface of the member 20.

The tubular member 21 has the bell shaped or flared outlet end28. A locking pin 29 extends from the other end of the member 21 which engages the opening 23 of the member 20' and constitutes therewith a bayonet joint for detachably locking the'blower in place. A loose sleeve 30 is locatedupon the tubular member 20 and abuts on one side against the locking pin 29. l I

The induction'tnbe B comprises the barrel with the bell shaped or flared induction end 36. A stem with the threaded inlet end 37 and tapered outlet end 38'has theaXial port 39. A flange 40 used for connecting the induction tube to the T to be described is formed with the stem. 'VVebs 41 connect the outlet end 38 of the said stein with the flared end 36 of the barrel 35.

A T 45 with the plug 46 is inth'readed engagement with the inlet end 37 of the stem and has depending therefrom the piping'C.

The piping C comprises the nipple 48 which is locked to the tubular member 20, by means of the lock nuts 49. A union 50 is connected to the nipple 48 and a nipple 51 extends from said union. The nipple 51, in this instance of each line of piping C, is connected to the steam inlet pipe 52, which has connected thereto on one end the sediment trap 53 and at its other end is connected the pet cook 54. Piping 55 with the valve 56 is'connected to the steam inlet pipe 52.

In this exemplification of the'invention a plurality of the blowers are shown applied to a marine boiler, which latter is designated in its entirety by the letter D. The boiler has the corrugated furnace 60, shell 61, front head 62, furnace door frame 63, with the doors 64, ash pit with the front ash pit plate 66 having the opening 66, dead plate 67, grate rest 68, grates 69, bridge wall 70 and saddles 71.

In this instance each of the blowers is locked to said plate 66 and supported in the opening 66 of said plate. The coaction of the flange 24 of the tubular member 20, the sleeve 30, and the bayonet joint having the locking pin 29, effect the locking of each blower. The sleeve 30 is made of a length to suitthe distance between the-inner face of the plate 66 and the pin 29, and by this means the blower can be easily connected to plates of different thicknesses, or detached therefrom. The flared inlet end 22 and the greater portion of the length of the member 20 are located outside of the ash pit 65, while the tubular member 21 is located therein and below the level of the grate bars 69. Screws 72 may also extend through openings in the flange 24 and engage threaded openings in the plate 66 to hold the blowers in place.

To operate the blowers the valve 56 is opened and steam in this instance enters the steam inlet pipe 52, the piping C, the T 15, the port 39 and into and through induction tube B. The steam inthis instance performing the function of a propelling fluid is discharged in the form of a jet from the 7 port 39 and causes a blast of air to enter the member 20 of the induction and delivery conduit A, the induction tube B and the member 21. The steam and air are comingled in the induction tube B and a blast of air and steam is discharged from the flanged outlet end 28 of the member 21, and delivered to the openings between the grate bars 69. The blast of air and steam impinges against the bed of fuel on the grate of the furnace and enhances the efiicient combustion of said fuel. V

The velocity of the jet of steam discharged from'the port 39 and consequently the volume and velocity of the air delivered by the blower to the fuel on the grate of the furnacecan be regulated by the valve 56.

By means of the pet cock 54: the steam inlet pipe 52 can be easily blown and cleaned. Theflared ends 22 and 28 of the conduit A and the tapered outlet'end 38 of the stem of the induction tube B, permit the 'easyinflow and discharge of the air from the said conduit.

Although in this empliflcation the blowers are connected to the ash pit plate 66, it is to be understood that the blowers can be connected to other portions of the boiler, for instance the blowers may enter the'ash pit at the sides thereof, or the blowers may be connected over the fuel on the grate.

Instead of supplying the pipe 52 with steam for the propelling fluid, compressed air, liquid fuel and various other fluids may be used. Good results may be obtained by forcing compressed air through the port 39. The latter, as in the case of steam, causes the air to flow into. and be discharged through the conduit A to form an air blast at the outlet end' 28. 7

The construction of the induction and delivery conduit A with the two members 20 and 21, that are detachably locked one with the other, permits. said conduit with its flared inlet end and flared .outletend to be easily connected to or detached from a plate desire to secure by Letters Patent and claim In combination a furnace blast blower comprising an induction and delivery conduit of two members telescoping with each other, one of said members having a flange extending from its outer surface and a flared inlet end and the other member having a flared outlet end, an induction tube for a propelling fluid supported in the conduit,

piping connected to said induction tube for said fluid, a plate with an opening'to'support said member having the flange formed therewith, said flange bearing against one face of said plate, .a loose sleeve on the mem her having said flange w th one, end bearing against the other face of said plate, a bay onet joint locking the members of the con duit together and a pin of said bayonet 01nt bearing against sald sleeve, 7

Signed at the borough of Manhattan,"

city of New York, in the county of New York and State of New York, this 29th day of January, A. D. 1921.

EDWIN SWIFT. 

